I have a space invaders deluxe I will be trying tonight. Will let you know what I find. David :-)= -----Original Message----- From: "John Robertson" <jrr@flippers.com> Sent: 6/27/2014 3:18 PM To: "techtoolslist@flippers.com" <techtoolslist@flippers.com> Subject: Re: [Techtoolslist] Fluke & Midway 8080 boards... On 06/27/2014 2:31 PM, Rodger Boots wrote:
Is there On Jun 27, 2014 1:59 PM, "John Robertson" <jrr@flippers.com <mailto:jrr@flippers.com>> wrote:
Hi Andrew,
Well, I'm not sure where the problem is at the moment, I don't
recall this happening in the past so indeed it could be my 8080 pod that is part of the problem...
I did find one cute trick - I have the Kurz Kash fixture and cards
for Sea Wolf and while it does allow you to test all the functions the LED lights are difficult to get to light up to make sure that all the driver transistors work. So I put the 8080 pod into Learn mode for 10000h - 1000FFh which is the I/O port for the 8080 and the lights all turn on - at least the lights for the transistors that work...Cute. Otherwise you have to load the the I/O data with 0F or F0 at the correct !/O port address which I haven't gotten around to figuring out yet.
Still can't get the high end FFs at addresses FF0h to FFFh to be
stable though...
Is there ROM at high addresses? On an 8080 the ROM should be from 0000.
By high address I meant 0FFFh, not FFFFh. It was the high end of the ROM space which is 0 - 0FFFh in Sea Wolf. The RAM test (2000h - 3FFFh) works just fine. Annoying. John :-#)# -- How to subscribe or unsubscribe from TTL http://seven.pairlist.net/mailman/listinfo/techtoolslist _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/